SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Link-ID == false, connect failed
mysql error: The server requested authentication method unknown to the client
mysql error number: 2054
Date: 07.05.2024 @ 23:49
Script: /board/register.php?sid=d0c201d8544c1eb7eefbf8574f336d59
Referer: